CN106282483A - Copper bearing steel production technology - Google Patents
Copper bearing steel production technology Download PDFInfo
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- CN106282483A CN106282483A CN201510350114.3A CN201510350114A CN106282483A CN 106282483 A CN106282483 A CN 106282483A CN 201510350114 A CN201510350114 A CN 201510350114A CN 106282483 A CN106282483 A CN 106282483A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The present invention relates to a kind of copper bearing steel production technology, being included in preparation temperature in blast furnace is 1400 DEG C～the molten iron of 1520 DEG C, in transfer molten iron to converter or electric furnace, adds copper-bearing mineral so that it is contact with molten iron in converter or electric furnace；Heating copper-bearing mineral is smelted with molten iron to 1400 DEG C～1600 DEG C.The present invention fully optimizes traditional copper bearing steel production technology, smelting and the production process of copper ferrum are saved, copper-iron alloy is replaced with copper-containing ore, while ensureing copper recovery rate, significantly reduce production cost, make production efficiency be improved, reduce economic input, save big content of starting materials, be suitable in relevant copper bearing steel field of smelting popularization and application.
Description
Technical field
The present invention relates to a kind of steel alloy smelting process, particularly relate to a kind of copper bearing steel production technology.
Background technology
At present, copper bearing steel is widely used with its excellent physical and mechanical properties such as anticorrosive, such as vehicle and container plate etc., its technique smelted is mainly by carrying out addition alloy treatment in the converter of steel-making (iron ore → sintering → blast furnace ironmaking → desulfurizing iron → converter (or electric furnace) → addition alloy → finely tune composition → continuous casting → rolling → finished steel to LF stove or RH or other refining equipment) or electric furnace stage, in converter or electric furnace, i.e. add copper-iron alloy reach composition needed for steel grade, in this process, consume a large amount of copper metal, and the production cost of copper-iron alloy is high, correspondingly, need a large amount of economic input, higher especially for the steel input cost smelting regional high background, and waste with ample resources.
In prior art, patent of invention 200710200906.8 discloses the heating means of a kind of copper bearing steel and the copper bearing steel of production thereof.The production of sheet material class copper bearing steel can be met, the copper-containing steel heating method that section bar class copper bearing steel produces can be met again.This copper-containing steel heating method, uses the heating means of twice intensification, the first step: the steel billet of heating copper bearing steel or strand to 1000～1050 DEG C；Second step: carrying out second time heat temperature raising with 30～90 minutes, the maximum temperature of heat temperature raising is 1250～1290 DEG C for the second time；In the heating process of twice intensification, steel billet or strand are all not less than previous time point in the heating-up temperature of each time point.This invention is that the production of cupric steel is improved, but substantially following traditional copper-iron alloy steel that adds is raw material, technique early stage preparation complexity, expends lot of materials, and Financial cost is high.
Summary of the invention
It is an object of the invention to, the problem existed for prior art, it is provided that a kind of copper bearing steel production technology, a large amount of raw materials are saved with the production technology optimized, economic input it is greatly reduced, and ensures the quality of production of copper steel, particularly make copper content therein be to be fully ensured.
The present invention solves the technical scheme of problem: a kind of copper bearing steel production technology, comprises the steps:
(1) molten iron is prepared
In blast furnace, preparation temperature is 1400 DEG C～the molten iron of 1520 DEG C；
(2) transfer molten iron
The molten iron that step (1) obtains is joined in converter or electric furnace；
(3) copper-bearing mineral is added
Copper-bearing mineral is added so that it is contact with molten iron in the converter described in step (2) or electric furnace；
(4) smelt
The molten iron of step (3) is heated with copper-bearing mineral, is warming up to 1400 DEG C～1600 DEG C.
Further, in described step (1), the weight/mass percentage composition of the component of gained molten iron is: the Si of 2.0%～3.4%, the C of 3.6%～4.6%, and surplus is Fe, and for inevitable impurity such as S, P, its content range is S≤0.3%, P≤0.13%；At high temperature, C, Si composition activity in molten iron is better than copper, it is possible to make copper oxide fully be reduced to metallic copper.
Further, in described step (3), described copper-bearing mineral is the Copper Ores based on copper oxide；Preferably, the copper content of described copper-bearing mineral is 0.3%～3.0%；It is preferred that the particle diameter of described copper-bearing mineral is 20mm～150mm.
Further, in described step (3), the copper-bearing mineral of addition is the copper-bearing mineral through pre-reduction treatment；Described copper-bearing mineral is carried out pre-reduction treatment step be: copper-bearing mineral is mixed by (3.1) with reducing agent, and the particle diameter of gained mixture is 20mm～150mm；(3.2) by the roasting at 550 DEG C～750 DEG C of gained mixture；Described in step (3.1), reducing agent is the material of carbon containing.In this pre-reduction treatment step, it is possible to make the copper oxide portion contained by Copper Ores be reduced, part chemical bond is in the state of activation in various degree so that its contact with high temperature liquid iron in step (4) after by reducing agent fast restores such as carbon.
Preferably, in described step (3.1), described reducing agent is one or several in carbon dust, graphite and coal.
Preferably, in described step (3.1), during in described reducing agent, the quality of carbon containing is copper-bearing mineral the 3%～15% of the quality of copper.
Preferably, in described step (3.2), the mixture of described copper-bearing mineral and reducing agent is 600 DEG C～700 DEG C of roastings 1～4h, and wherein, heating rate during heating blends is preferred with 5～25 DEG C/min；Time and heating rate that concrete roasting keeps are determined according to the granularity of copper-bearing mineral with the mixture of reducing agent, such as, particle diameter is that 80mm～150mm is preferred with 4h, particle diameter is that 20mm～40mm is preferred with 1h, particle diameter is that 60mm～100mm is preferred with 3.5h, particle diameter is 40mm～60mm, is preferred with 2h.
Further, in described step (4), it is 10～20 DEG C/min to copper-bearing mineral and the blend heated heating rate of molten iron.
Further, in described step (4), copper-bearing mineral keeps 8～15min with the mixture of molten iron at 1400 DEG C～1600 DEG C, actual temp and time are determined according to the amount of molten iron and copper to be restored, to guarantee in copper-bearing mineral that copper is thoroughly reduced and avoid that the response time long affects copper bearing steel quality simultaneously.
Preferably, in described step (1), prepare molten iron through the heated by electrodes bulk pig iron.
Preferably, after above-mentioned smelting process terminates, it is possible to product is goed deep into processed, can recycle, such as, according to the needs of practiced steel grade smelting residue, add required Calx and/or bits composition is adjusted by molten slag agent so that it is be recycled recycling.
Compared with prior art, the invention has the beneficial effects as follows: fully optimize traditional copper bearing steel production technology, smelting and the production process of copper ferrum are saved, replace copper-iron alloy with copper-containing ore, while ensureing copper recovery rate, significantly reduce production cost, production efficiency is made to be improved, reduce economic input, saved big content of starting materials, be suitable in relevant copper bearing steel field of smelting popularization and application.
Detailed description of the invention
:
Embodiment 1
As a example by preparing the copper bearing steel that copper content is 0.3%, this kind of copper bearing steel production technology comprises the steps:
(1) molten iron is prepared
The molten iron that 4t temperature is 1470 DEG C is obtained in blast furnace；
(2) transfer molten iron
The molten iron ladle that step (1) obtains is joined in electric furnace；
(3) Copper Ores is added
The Copper Ores 400kg that copper oxide content is 3.0% is added so that it is be fully contacted with molten iron in the electric furnace described in step (2)；
(4) smelt
The molten iron that obtains of step (3) is heated with Copper Ores, is warming up to 1550 DEG C, and keeps 10min at 1550 DEG C.
In above-described embodiment:
In described step (1), the weight/mass percentage composition of the component of gained molten iron is: the Si of 2.7%, the C of 4.1%, and surplus is Fe；
In described step (3), described Copper Ores is cupric oxide ore；Described Copper Ores particle diameter is 20mm～150mm；
In described step (4), it is 15 DEG C/min to copper-bearing mineral and the blend heated heating rate of molten iron.
In above-mentioned copper bearing steel production technology, make full use of high temperature in stove and make its Copper Ores dissolve, and make full use of C, Si composition activity in molten iron and be better than the character of copper, make copper oxide at high temperature be reduced sufficiently as metallic copper.After above-mentioned smelting process terminates, it is possible to product is goed deep into processed, it is possible to recycle smelting residue, such as, according to the needs of practiced steel grade, add required Calx and/or bits composition is adjusted by molten slag agent so that it is be recycled recycling.
Above-mentioned copper bearing steel production technology, compared with traditional copper bearing steel production technology, has carried out significantly optimizing, and has saved smelting and the production process of copper ferrum; copper-iron alloy is replaced with copper-containing ore; while ensureing copper recovery rate, significantly reduce production cost, make production efficiency be fully enhanced; and correspondingly reduce a large amount of economic input; save big content of starting materials, and, choosing of cupric oxide ore raw material; it is more conducive to protect environment, it is to avoid the discharge of the pollutant such as sulfur-bearing.
Embodiment 2
As a example by preparing the copper bearing steel that copper content is 0.3%, this kind of copper bearing steel production craft step is with embodiment 1, and except for the difference that, in described step (3), the Copper Ores of addition is the copper-bearing mineral through pre-reduction treatment；Described Copper Ores is carried out pre-reduction treatment step be:
(3.1) mixing with reducing agent after being pulverized by Copper Ores, the particle diameter preparing mixture is 20mm-150mm；
(3.2) by gained mixture roasting 3h at 600 DEG C；
Wherein, described reducing agent is carbon dust, during in described reducing agent, the quality of carbon containing is copper-bearing mineral the 5% of the quality of copper.
In the above-described embodiments, by the pre-reduction treatment to Copper Ores, make its contained copper oxide portion be reduced, part chemical bond is in the state of activation in various degree, so that its contact with high temperature liquid iron in step (4) after by reducing agent fast restores such as carbon, and then be beneficial to production efficiency is greatly improved.
In above-mentioned copper bearing steel production technology gained copper bearing steel, copper content is 0.282%, and copper recovery rate is 96%.
Claims (5)
1. a copper bearing steel production technology, it is characterised in that comprise the steps:
(1) molten iron is prepared
In blast furnace, preparation temperature is 1400 DEG C～the molten iron of 1520 DEG C；
(2) transfer molten iron
The molten iron that step (1) obtains is joined in converter or electric furnace；
(3) copper-bearing mineral is added
Copper-bearing mineral is added in the converter described in step (2) or electric furnace；
(4) smelt
Carry out being heated to 1400 DEG C～1600 DEG C by the molten iron of step (3) and copper-bearing mineral.
Copper bearing steel production technology the most according to claim 1, it is characterised in that in described step (1), the weight/mass percentage composition of the component of gained molten iron is: the Si of 2.0%～3.4%, the C of 3.6%～4.6%, and surplus is Fe.
Copper bearing steel production technology the most according to claim 1, it is characterised in that in described step (3), the copper-bearing mineral of addition is the copper-bearing mineral through pre-reduction treatment；Described copper-bearing mineral is carried out pre-reduction treatment step be: copper-bearing mineral is mixed by (3.1) with reducing agent, and the particle diameter of gained mixture is 20mm～150mm；(3.2) by the roasting at 550 DEG C～750 DEG C of gained mixture；In described step (3.1), described reducing agent is the material of carbon containing.
Copper bearing steel production technology the most according to claim 3, it is characterised in that in described step (3.1), described reducing agent is one or several in carbon dust, graphite and coal.
Copper bearing steel production technology the most according to claim 3, it is characterised in that in described step (3.1), during in described reducing agent, the quality of carbon containing is copper-bearing mineral the 3%～15% of copper mass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350114.3A CN106282483A (en) | 2015-06-24 | 2015-06-24 | Copper bearing steel production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510350114.3A CN106282483A (en) | 2015-06-24 | 2015-06-24 | Copper bearing steel production technology |
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| CN106282483A true CN106282483A (en) | 2017-01-04 |
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| CN201510350114.3A Pending CN106282483A (en) | 2015-06-24 | 2015-06-24 | Copper bearing steel production technology |
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- 2015-06-24 CN CN201510350114.3A patent/CN106282483A/en active Pending
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Application publication date: 20170104 |
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| WD01 | Invention patent application deemed withdrawn after publication |